where
\(\alpha ^i \equiv \gamma ^0 \gamma ^i\)  and \(\beta \equiv \gamma ^0\) .
The mass dependent terms in the LC Hamiltonian include the fermion kinetic term in Eq. (REF ) and the three point (two fermions and one gluon) interaction terms in the last two lines of Eq. (REF ). Four-point interaction terms are mass independent. While dealing with massive quarks, it is convenient to operate with four component spinors for fermion fields (note that this convention is different from Ref. [1]}). The final results are, of course, independent of the conventions.
